JPS60261819A - Controlling device for water level in rice paddy - Google Patents

Abstract

PURPOSE:To automatically feed water to a rice paddy and to save a labor, by a method entrance to night, a difference in a water temperature between a rice field and a irrigation canal, and a water level in a rice paddy are detected by their respective sensors, and based on said detection, a controller part automatically controls operation of a gate. CONSTITUTION:A night sensor S4 which detects that it is night, a rice paddy water temperature sensor S2 and an irrigation canal water temperature sensor S1 which detect water temperature of a rice paddy 2 and an irrigation canal 1 respectively, and a rice paddy water level sensor S3 which detects a water level in the rice paddy 2 are located in the rice paddy 2. Through operation of the night sensor S4 and based on either a fact in that a difference in a water temperature between the irrigation canal and the rice paddy exceeds a set value or a fact in that a water level in the rice paddy is below a set value, a controller part C drives a motor 6 to open a gate 5 to feed irrigation water in the irrigation canal 1 to the rice paddy 2. This enables automation of management, of water in relation to the feed of water to the rice paddy 2, resulting in the possibility to save a man hour.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a water level control device for rice fields, and is intended to automatically adjust the water level to maintain the temperature of the rice fields.

Conventional technology In order to promote the growth of rice, it is necessary to supply warm water to the rice fields, and especially in cold weather, supplying warm water is important to prevent the soil temperature and θ of the rice fields from dropping. .

For this purpose, during the daytime, water is raised shallowly to improve the heat absorption effect of the rice fields due to solar heat, and at night, for example, water from irrigation canals, whose temperature is rising due to solar heat and atmospheric heat, is moved closer to the sun. It is known that bringing deep water into paddy fields is an effective measure against cold weather.

However, since it is not easy to manually supply water at night, conventionally, water is supplied in the evening to create deep water, and during the day, water is supplied from irrigation canals that have sufficiently warmed up by flowing through long rivers. At present, water is not fully utilized for heat insulation.

Problems to be Solved by the Invention Therefore, the present invention is designed to automatically supply water under certain conditions, such as at night or when the water level in a paddy field drops, to maintain a sufficient water temperature. It was designed so that it can be used for.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a nighttime sensor (S4) for detecting nighttime, a paddy field (2), and a system for supplying water to the paddy field (2). A rice field water temperature sensor (S2) and an irrigation water temperature sensor (Sl) that detect the water temperature of each irrigation canal (1), a rice field water level sensor (S3) that detects the water level of the rice field (2), and a It consists of a water gate (3) that supplies water, and the operation of a night sensor (S4).
A predetermined supply operation command is given to the water gate (3) when at least one of the following conditions is satisfied: the difference between the water temperature of the paddy field and the water temperature of the irrigation canal is greater than or equal to the set value, and the water level of the paddy field is less than or equal to the set value. The water level control device for a paddy field is characterized in that it includes an operating control section C).

EMBODIMENT AND OPERATION Next, one embodiment of the present invention is shown in FIG.
2゜. +1 N IoJ Mga cacao, eh. 〇Sluice gate (3) that supplies water from irrigation canal (1) to paddy field (2)
In the illustrated example, the shutter (5) installed on the water intake pipe (4)
By switching the rotation direction of the motor (6) between normal rotation and reverse rotation, the pinion (8) provided on the output shaft (7) of the motor (6) can be rotated between the shutter (5) and the single rack (
9) The water intake pipe (4) is provided so as to open or shut off to an appropriate area by reciprocating.

The irrigation canal (1) and the paddy field (2) are equipped with a water temperature sensor (S,) and a paddy water temperature sensor (S,) made of, for example, a thermistor, in order to detect the respective water temperatures. 2) a paddy field water level sensor (S3) made of something like a phototube to detect the water level; and a nighttime sensor (S3) made of something like a phototransistor that turns off when it detects a constant darkness at night. S4) are installed respectively, and a water temperature sensor (S,) and a paddy water temperature sensor (
Input each output of S2) to the comparator (]0), input the output of the comparator (10) to the base of the transistor (Tr, ), and connect the collector of the transistor (Tr, ) to the AND via the water temperature changeover switch C11le. Input terminal of circuit +121 (
12a), and when the difference between the water temperature of the paddy field and the water temperature of the irrigation canal reaches the set value set by comparison aO)K, for example 0, a potential of θ level is output from the comparator () and the potential of the transistor ( Tr,) turns from on to off, AND
Circuit 121 Ensures that there is human power at the VCH level, and when the water level of the rice field (2) reaches a certain level, the pace of the transistor (Tr2) is set to 0 from the rice field water level sensor (S3).
The high level is output, the transistor (Tr2) is turned off from on, and the H level output is output via the water level changeover switch 03) to the input terminal 1 (J2b) of the AND circuit 1.
), and the output of the night sensor (S4) is input to the input terminal -R+2c) VC of the AND circuit 1 through the night changeover switch α4jk. In this case, for example, when it becomes a certain darkness , the H level output from the night sensor (S4) is input to the AND circuit +121 VC, so the input terminals (+2a), (12b), (J2C
), when both inputs are at H level, the AND circuit (1
Since there is an H level output from 21 to the transistor (Tr3), the control unit (0 is configured n, drive relay diagram Due to this ON operation, a closed circuit shown by the thick line in Fig. 2 is formed, and the motor (6) starts rotating in the positive direction of the opening direction of the shutter (5), for example, when the water gate (3) is opened at a certain level. When the opening is n, the switch (Ll) stops the rotation of the motor (6), and conversely, when the drive relay ■ is switched off, the shutter (5) is turned off.
The drive circuit diagram is configured so that the rotation of the motor (6) is stopped by the switch (L, )K when the water gate (3) is closed, for example, by starting full rotation in the opposite direction to the closing direction. ing.

The illustrated control unit (C1 is water temperature changeover switch a1), water level changeover switch (1B), nighttime changeover switch (b),
By switching to the non-detection terminals μs), C6), (5), the input terminals (12a), 02b), (12c) I
For example, when the water level changeover switch αB) is switched to the non-detection terminal C161 side, the above-mentioned values are input regardless of the detected value of the paddy water level sensor (S3). When the water temperature difference reaches the set value and it is night, the drive relay (R) is turned on, and if it is daytime, the drive relay (R) is turned off regardless of the water temperature difference. This embodiment has the advantage that the water level can be controlled by appropriately selecting three conditions: nighttime, the temperature difference between the water temperature of the paddy field and the water temperature of the irrigation canal, and the water level of the paddy field.

Contrary to the above-described embodiment, the nighttime sensor (S4) may have a circuit configuration in which it is replaced with a sensor that detects that it is daytime. Alternatively, instead of detection based on the amount of light, for example, a timer may be used as a nighttime sensor (S4). S ) may also be used. Control unit (0,
In addition to the illustrated example, other drive units (6) and water gates (3) having similar functions may also be used.

Effects of the Invention As described above, the present invention includes a nighttime sensor (S4) that detects that it is nighttime, and detects the water temperature of each of the paddy field (2) and the irrigation canal (]) that supplies water to this paddy field (2). a paddy field water temperature sensor (S2) and an irrigation water temperature sensor (S,) to detect the water level in the paddy field (2), and a paddy field water level sensor (S3) to detect the water level in the paddy field (2).
It consists of a sluice gate (3) that supplies water from the irrigation canal (1), and the operation of the night sensor (S4) and the difference between the water source and the irrigation canal water temperature are greater than the set value. When at least one of the conditions that the water level is below the set value is satisfied, a control section (C1) is provided which operates by giving a predetermined supply operation command to the water gate (3), so that the above-mentioned certain conditions are met. Water management by automatic water supply to the rice fields (2) has become an automated function, and by this, for example, at night, the water in the irrigation canal (1) is kept as deep water. The water temperature can be fully utilized, contributing to the growth of rice, and ideal water management can be carried out with less labor.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, with Fig. 1 being a perspective view of the device and Fig. 2 being a control circuit diagram. Paddy fields (3
)... Sluice gate (So)... Water temperature sensor (S,)...
...Paddy water temperature sensor (S,) ...Paddy water level sensor (S4) ...Night sensor': Patent applicant Iseki Agricultural Machinery Co., Ltd.! Representative Patent Attorney Takayoshi Hayashi

Claims (1)

[Claims] A nighttime sensor that detects that it is nighttime, a paddy field water temperature sensor and an irrigation water temperature sensor that detect the water temperature of the paddy field and the irrigation canal that supplies water to the paddy field, a paddy field water level sensor that detects the water level of the paddy field G, and The system consists of a sluice gate that supplies water, and at least one of the following conditions is satisfied: the difference between the operation of the night sensor and the water temperature of the paddy field relative to the water temperature of the irrigation canal is greater than or equal to the set value, and that the water level of the paddy field is less than or equal to the set value. 1. A water level control device for a paddy field, comprising: a control section that operates to give a predetermined supply operation command to a water gate when